A bag contains 4 blue marbles and 4 red marbles. If three marbles are drawn in a row without replacement, find the probability that the marbles will be the same colour?
2 answers
Max, Charlotte, Markus -- please use the same name for your posts.
To have the same colour, you need
either BBB or RRR
Find the prob of each case, then add them up
either BBB or RRR
Find the prob of each case, then add them up